Method of manufacturing thin bronze or other metal plates.



or adhesive agent.

I UNTTnn STATES Patented May 52, 196$.

PATENT it iii ERNST OESER, OF SCHONEBERG, NEAR BERLIN, GERMANY, ASSEGNORTO (urENTHlNER .CARTONPAPlER-FABRIK G. M. B. vIi, 0F BERLlN,

GERlvl ANY.

METHOD OF WIANUFACTURENG THIN BRONZE OR OTHER METAL'FLATE$=SPECIFICATION forming part of Letters Patent No. 788,940, dated May 2,1905.

Application filed November l i, 1903. Serial No. 181,216.

To all whom it 'H'I/(X/Z/ concern.-

Be it known that I, ERNST Onsnn, manufacturer, a subject of the GermanEmperor, residing at No. 19-20 Bahnstrasse, in the city of Schoneberg,near Berlin, in the Kingdom of Prussia, German Empire, have inventedcertain new and useful Improvements in Methods for the Manufacture ofThin Bronze or other Metal Plates, of which the following is a full andexact specification.

This invention relates to an improved method for the manufacture of thinbronze or other metal plates.

For the purpose of manufacturing metal stampings or printings on paper,leather, or the like it has been usual to use sheet metal and a suitablegrounding and binding agent or adhesive; but the sheet metal has thedisadvantage that with fine ornaments or with very small letters thepatterns do not come out sharp enough and that frequently the object tobe treated is impaired by the use of grounding and binding agents. Ithas also been attempted to manufacture metal stampings and printings bypowdering the part to be treated with bronze-powderand then pressing thedie upon it. By this method, on the 7 one hand, incompletely-coveredstam pings are produced, and, on the other hand, the stamping or patternhas a dead appearance, the socalled bronze stampings never filling theplace of those produced by the use of the sheet metal.

In order to quickly and conveniently produce polished metal stampings bynceans of bronze or metal powder, the said metal powder is combined witha thin layer of color in any suitable manner and laid on the part to beprinted or patterned similarly to a thin plate of metal without usingany grounding The manufacture of such thin bronzeplates is the object ofthe pres-- ent invention, andaccording thereto the color mass is'laidthinly on aglass plate-which serves first as a support for thebronze-powder, and then said mass is scattered over with thebronze-powder througha suitable sifting device. When dry, thesuperfluous bronze- ..stampihgpurposes, which consists in form:

powder is removed with a soft brush and the thin layer or plate takenoff inthe known manner with a pallet-knife. composed in a similar mannerto the known thin plates of color-that is to'say, they consist of size,glycerin, a suitable powdered color as, for instance, zinc-white, ocher,or

It not only,

the lll 6-W2ti31, and albumen. acts as a support, but also as groundingand binding agent, and gives the bronze-powder the necessary polish onthe stamping. It will be seen that variouslycolored bronze-powders canbe used for the manufacture of said thin bronze plates, and, ifnecessary, it maybe laid on the already-painted layer in such a mannerthat the color becomes iridescent in or dcr to produce an iridescenteffect in the metal stampings or printings.

What I claim as my invention, and desire to secure by Letters Patent ofthe United iEt-ates,

1. A method for the manufacture of thin bronze plates for stampings andprintings consisting in laying a liquid mass of size and glycerin on asmooth surface, scattering the bronze or other metal powder upon saidlayer, while still moist, and removing the layer and metal coating whendry from said surface substantially as described.

2. A process for producing bronze-leaf, consisting in forming upon asmooth surface a layer of binding and cohesive material in a moiststate, sifting finely-divided bronze thereupon while the former is in amoist state, allowing the product to dry,- and removing the same fromsaid smooth surface in the form of a leaf or foil.

3. A process of producing metal leaves ft stamping purposes, whichconsists in forming upon a smooth surface a liquid bottom layer of'adhesive material, scattering metal powder on the bottom layer whilestill moist toform a non-adhesive top layer thereomand removing theproduct from the smooth sur face when. dry.

4c. A process of producing metal leaves upon a smooth surfaces iiquidbottom The mass is of. adhesive and coloring material, allowing" Theforegoing specification signed at Berthe lcximyer to artly dry, tlhenscattering metal lin this 3d clay of November, 1903.

pow er on t e bottom ayer to'form a non v adhesive'tzop layerthereomallowing theprod ERNSI? OLSER" '5 net to completely dry, thenremoving the su- In presence of perfluous metal powder, and finallyremoving HENRY HASPER,

the, product from the smooth surface. WVOLDEMAR 'HAUPT.

